DTC P0159 Ho2S Circuit Slow Response (Bank 2/Sensor 2): DTC Detecting Condition

DTC DETECTING CONDITION

Item	Detecting Condition	Possible Cause
DTC Strategy	Slow response (Switching time check at entry in Fuel cut off)	Leak in intake or exhaust system Faulty fuel system. Front and rear HO2S connections reversed. Contact resistance in connectors HO2S contamination
Enable Conditions	Fuel cut-off phase Sensor preheating and full phase finished Catalyst temp.model > 350°C (662°F) Coolant temp > 70°C (158°F) Downstream O2 Sensor Signal > 0.55V at Entry in Fuel Cut-Off
Threshold Value	Average ratio (between measured and maximum allowed switching time at entry in fuel cut-off) > 1
Diagnostic Time	5 fuel cut-off phases
MIL On Condition	2 Driving Cycles